Chills man. Nothing can beat Benedict Cumberbatch's performance as Khan even though we saw the reveal coming it was still awesome. I think Krall was better than Nero though and I do like Beyond better than Into Darkness. But Khan is the best!

but I'd have to go with Khan. Nero was a really stupid idea for a villain that felt cartoonish and Krall was menacing at first but felt inadequate when "explained". OTOH, Benedict Cumberbatch gave depth to Khan and his devotion to his people.